Improvement in saw-filing machine



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JAMES H. VANNORTWIGK, OF IS'IIIRGrIS, MICHIGAN.

Letters Patent No. 82,047, dated September 8,1868.

IMPROVEMENT IN SAW-FILING MAGHINB.

TO ALL WHOM IT MAY CONCERN:

4 Be it known that I, JAMES H. VAN NORTWICK, of Sturgis, in the countyof St. Joseph, and State of Michigan, have invented certain new anduseful Improvements in Saw-Filing Machines; and I do hereby declare thatthe following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specication, in which- Figure1 is a plan view.

Figure 2 an end view.

Figure 3 a side view of the device by which the file-carriage isattached to thefeed-screw.

The nature ofVmy invention consists in the construction and generalarrangement of a self-feeding machine for tiling saws, by which saws maybe filed with .the utmost accuracy, and at the same time with greatdispatch.

The machine will file any-sized tooth, and at any angle desired.

In order to enable others skilled in the art to which my inventionappertains to make and use my invention, I will now proceed to describeits construction and operation. i

A represents auframe, made of suitable material, and of any dimensionsrequired, which frame rests on legs, B B, and is provided on one sidewith clamps, C C, for holding the saw which is to be led.

A shaft, D, runs'through the frame A, havingits bearings in the sidesthereof, and extending beyond said sides, and is provided in' one endwith a crank, E, by the turning of which the machine is operated, or, ifdesired to run it by any other than hand-power, the other end of saidshaft is provided with a wheel, F, on whicha belt may be put. A groove,a, runs the whole length of the shaft D, the use of' which will behereinafter set forth.

Betweenvthe crank E and the end of the frame A, and on the shaft D, is asmall cam, G, o'ne sid-e of which is cut off, as seen in g. 2. Thiswheel operates against an arm, H, which is provided with a small roller,c, so as to slide easily against the outside-periphery of the cam Gr.The arm Heis pivoted on the end=of the frame,

and isbent, the other end extending downwards, forming the lever, I, thelower end of which yis connected b'y a rod, d, to a similar lever, I, onthe'same end, but other side of the frame.

On the rod d a pawl,f, is pivoted, which is held upwards by a spring, e,and catches into the cogs on the driving-wheel `K, which is secnred'to apart of the frameA, and gears into the pinion L. This pinion is on theend of the feed-screw M, which runs through the machine parallel to theshaft D, and has its bearings in the ends of the frame.

It will thus be seen that, byturning the crank E, the wheel G operateson the arm H, and, as soon as the round part ofthe wheel'strikes saidarm, thepawlf forces the driving-wheel around, turning the feed-screw Mrmtil the straight side of the wheel G comes against the arm H, when thepawlfis moved backward, ready to turn the wheel K, as soon as a newrevolution of the crank commences.

The upper'side of the frame A is provided with ways, on which thecarriage, N, slides, when the feed-screw is turned. The moving of saidcarriage is accomplished by means of twoarms, g gwhich are cut out andprovided with screw-threads, so that, when put together, they form anut,fitting on the feed-screw M. These arms Y are joined together at thetop, by means of link or -ring, h, and pass down through a slot in thecarriage N, surrounding the feeds'crew below the same, and the lowerends of said arms secured to a bent bar, z', on the under side of thecarriage, as shown in fig. 3; so that, by this arrangement, therevolving of the feed-screwM moves the carriage to one side or theother.

On the shaft D is a collar, 7c, to which is secured a cogged wheel, O,which extends up through another slot in the carriage. The`collar k isprovided with a lug or pin, which fits into the groove a on the shaft D,enabling it to slide along on said shaft, as the carriage is movedeither way by the revolving of the feed-screw.

The wheel O gears into a smaller wheel, P, which is secured to a shaft,Q, on the upper side of thecarriage, having its bearings in earsthereon.

On the end of this shaft Q is another wheel, R, to which a p itman, m,is secured, by means of`a crank. This pitman is connected with thewalking-beam u, moving the file-handle S back and forth.

T is a movable plate, on top of the carriage N, pivoted thereon, and canbel turned at any angle desired,

by means of a screw, U. On this movable plate a carriage, o, is placed,in which thc file-handle S slides, as moved by the walking-beammentioned.

The ile is secured to the end of the lle-handle, and extends over thesaw fastened in the clamps C C, and a spring,'p, is attached tothe'le-handle, in such a manner that, when the handle moves forward, aprojection, s, on each side of said spring, tits into grooves on thesides of the carriage o, holding the file down on the saw, and, as soonas the handle commences to move back, the spring bends upward, bringingthe projections mentioned'on top ofthe carriage, lifting the file upfrom the saw.

It will thus be seen, that, by turning the crank E, th'e'le, as arrangedin its handle, makes two strokes in the same tooth by one revolution ofsaid crank, and, as it goes backl the second time, the feed-screw M isrevolved, bringing the le to the next tooth, and so on, till the wholesaw is filed. v I

After filing through, the carriage N is brought back; by pressing downthe pawlf, and turning the feed-- wheel K iu the opposite direction, forwhich purpose a handle is attached to the same. 'Y

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combination of cam G, secured to the shaft D, arm H, levers I I,connecting-rod ,pawl f, and spring e, all constructed as described,` andoperating for the purpose of turning the feed-screw M, `by means of thedriving-wheel K, thereby moviugthe carriage N, substantially asherein'set forth.

2. The arrangement of the shaft'D, movable collar k, wheelsO, P, and R,in combination with the pitman m and walking-beam u, all constructed asdescribed, for the purpose of moving the ile-handle S back and forth,substantially as 'herein set forth.v y o 3.A The combination of themovable plate T, carriage O, and screw U', to turn the file at any angledesired, substantially as herein set forth. 4

4. The arrangement of the tile-handle S, connected with the walking-beamu, and provided with the spring p, constructed and operatingsubstantially as and for the purposes herein set forth.

5E The arrangement of the frame A, clamps C C, shaft D, feed-screw M,and carriage N, all with their diferent parts constructed as described,and operating substantially as and for the purposes herein'set forth.

In testimony that I claim the foregoing as my own, I aix my signature`inpresence of two witnesses.

y JAMES H. VAN NORTWICK.

Witnesses: JAMES R. McKNIGHT A. A. POPE.

